---Do you know where David is? I couldn’t find him anywhere. ---Well. He ______ have gone far----his coat’s still here.
Paper making began in China and from there it _____ to North Africa and Europe.
When the entire class worked together they finished the project _____.
Having checked the doors were closed, and _____all the lights were off, the boy opened the door to his bedroom.
To save class time, our teacher has ______students do half of the exercises in class and complete the other half for homework.
The _____ of his clothes indicated too clearly that he had been playing football.